I have a variable-speed air handler with a 1/2 HP ECM. Mine is rated @ 350W for full airflow @ 0.5" WC. In many systems, the blower fan runs a minute or so before heating or cooling begins and ends to get air flowing. Common fan ⦠ON mode = Fan is on all the time Letâs also assume weâre talking about a central air system with a blower motor (fan) located inside the home. Or vice versa, the fan will circulate warm air from upstairs (like in the winter) into the basement. Continuous Fan Airflow. I have kept my fan on since the day it was installed. Usually you use Auto, so the fan runs when the furnace or A/C runs. Circulate fan ON time setting NOTE â If the circulate fan mode is on, a timer is set to measure all the time that the fan is blowing, regardless if it is running to deliver heating or cooling or just for circulation. These systems are usually âclosed loop systems,â which circulate conditioned air (heat or AC) throughout the home via ductwork and vents in ⦠I have timed circulation set up to run about 1/3 of the time. Circulate makes it turn on and off randomly throughout the day. This helps if you have a cool basement, and you want to circulate that cool air upstairs too (a cheap way to air condition). The only other time your blower fan should be running on its own is if you've flipped the thermostat switch to "on" to temporarily run your blower fan for increased air circulation. It runs at about 50% CFM in "fan only", which translates to ~80W for a 3 ton air handler. But it's dry in Arizona. For the dehumidification function to work, your system will need a thermostat/control that reads humidity and can energize this dehum port when the relative humidity exceeds the setpoint in the building. The fan should start to run on the hour and may keep running beyond the set time in order to heat or cool the house to the desired temperature. Experts at the Energy Extension Service at Kansas State University estimate that the compressor consumes 10 times as much energy as the fan in a central air conditioner. I've never heard of ⦠On makes the fan run 100% of the time regardless of what is going on with the furnace or compressor. Some people leave the fan on all the time. First reason to have it on all the time, air filtration. The fan on is used during the middle of the seasons where you don't need either heat not cool. Reduce the fan on time after temperature setpoints are met to minimize the amount of moisture blown back into the house from the evaporator coil. Local Schedule Enable [Yes], No In Circulate, the fan can run for 15 minutes per hour (15mins), 30 minutes per hour (30mins) or 45 minutes per hour (45mins). Second is to get hot spots in the house. 35% - 100% [50%] Select the desired fan speed when the Fan Mode selected is Continuous (variable speed blower required) Fan Circulate On Time. On mine, it aims for being on something like 30% of the time. The nice thing abotu the circ fan mode on some fo the White Rodgers, it won't circulate the fan for the first 60 minutes after the equipment has run. I have two 1F95-1291's on my systems and like to overall operation. Circulate" is enabled on the userâs home screen or system settings page. In the summer, this gives the evap coil time to drain before the fan comes on. 1 - 59 minutes, [Off] Select the desired amount of time the fan will cycle per hour when the Fan Mode selected is Circ. The above numbers seem more like the ballpark for an air handler with a PSC motor. If you have any questions or need further assistance, please contact Nexia Customer Support via email at help@nexiahome.com or call 1-877-288-7707, Monday-Friday 9 AM â 8 PM ET, and Saturday-Sunday 10 AM â 5 PM ET. Use a circulation fan to circulate outside cool air into a home instead of running the A/C compressor, particularly in dry, mild climates.
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